var canvas = document.getElementById('c1')

if (canvas.getContext) {
	var ctx = canvas.getContext('2d')

	ctx.fillStyle = 'rgb(200, 0, 0)'
	ctx.fillRect(25, 25, 100, 100)
	ctx.clearRect(30, 30, 10, 10)

	ctx.fillStyle = 'rgba(0, 0, 200, 0.5)'
	ctx.fillRect (100, 100, 100, 100)

	ctx.strokeStyle = 'rgb(200, 0, 0)'
	ctx.strokeRect(25, 220, 100, 100)

	ctx.beginPath()
	ctx.arc(300, 100, 50, 0, Math.PI*2, true)
	ctx.stroke()

}